Sentence 5 says 'this small change in perspective'. You must find out the sentence in which there is a change in perspective. 2 is that statement: speaking about yourself in the third person. The third person is a change in perspective. 2 and 5 form a pair. 4 introduces the idea of rumination, and 3 says that people prone to rumination are at a risk of depression. So there must be some alternative to rumination. 2 presents that alternative; it is 'illesim', which has some benefit as stated in 5 . Thus 4325 form a paragraph. There is no place for 1